export type IntensityBand = 'sedentary' | 'light' | 'moderate' | 'vigorous';
export interface MetEstimate {
    met: number;
    band: IntensityBand;
    cadenceSpm: number | null;
    speedMps: number | null;
}
/**
 * MET from cadence when speed unknown (Tudor-Locke cadence–intensity mapping).
 */
export declare function metFromCadence(cadenceSpm: number): number;
/**
 * Combined MET estimate — prefers speed (Compendium), falls back to cadence.
 */
export declare function estimateMet(speedMps: number | null, cadenceSpm: number | null): MetEstimate;
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